If you are thinking of migrating to Australia to work in a professional or skilled area, you are required to pass a points test in order to apply for a visa. The points test is used to help Australia select people who have the skills and attributes it needs. You are given points for different reasons, including your age, English language ability and professional experience.
The graphic below is a summary of the test. As you can see, getting a high band in the IELTS test is very helpful, especially if you don’t have many points in other areas.